Add floor and ceil RealFunctions

fintarin · Oct 25, 2023 · e9ef065 · e9ef065
1 parent f608319
commit e9ef065
Show file tree

Hide file tree

Showing 3 changed files with 59 additions and 0 deletions.
diff --git a/include/fintamath/numbers/RealFunctions.hpp b/include/fintamath/numbers/RealFunctions.hpp
@@ -4,6 +4,10 @@
 
 namespace fintamath {
 
+Integer floor(const Real &rhs);
+
+Integer ceil(const Real &rhs);
+
 Real abs(const Real &rhs);
 
 Real sqrt(const Real &rhs);

diff --git a/src/fintamath/numbers/RealFunctions.cpp b/src/fintamath/numbers/RealFunctions.cpp
@@ -3,9 +3,20 @@
 #include "fintamath/exceptions/UndefinedException.hpp"
 
 using boost::multiprecision::cpp_dec_float_100;
+using boost::multiprecision::cpp_int;
 
 namespace fintamath {
 
+Integer floor(const Real &rhs) {
+  cpp_dec_float_100 res = boost::multiprecision::floor(rhs.getBackend());
+  return res.convert_to<cpp_int>();
+}
+
+Integer ceil(const Real &rhs) {
+  cpp_dec_float_100 res = boost::multiprecision::ceil(rhs.getBackend());
+  return res.convert_to<cpp_int>();
+}
+
 Real abs(const Real &rhs) {
   return rhs < 0 ? -rhs : rhs;
 }

diff --git a/tests/src/numbers/RealFunctionsTests.cpp b/tests/src/numbers/RealFunctionsTests.cpp
@@ -6,6 +6,50 @@
 
 using namespace fintamath;
 
+TEST(RealFunctionsTests, floorTest) {
+  EXPECT_EQ(floor(Real("-1000.8")).toString(), "-1001");
+  EXPECT_EQ(floor(Real("-1000.1")).toString(), "-1001");
+  EXPECT_EQ(floor(Real("-1000")).toString(), "-1000");
+  EXPECT_EQ(floor(Real("-1.9")).toString(), "-2");
+  EXPECT_EQ(floor(Real("-1.5")).toString(), "-2");
+  EXPECT_EQ(floor(Real("-1.3")).toString(), "-2");
+  EXPECT_EQ(floor(Real("-1")).toString(), "-1");
+  EXPECT_EQ(floor(Real("-0.9")).toString(), "-1");
+  EXPECT_EQ(floor(Real("-0.3")).toString(), "-1");
+  EXPECT_EQ(floor(Real("0")).toString(), "0");
+  EXPECT_EQ(floor(Real("0.3")).toString(), "0");
+  EXPECT_EQ(floor(Real("0.9")).toString(), "0");
+  EXPECT_EQ(floor(Real("1")).toString(), "1");
+  EXPECT_EQ(floor(Real("1.9")).toString(), "1");
+  EXPECT_EQ(floor(Real("1.5")).toString(), "1");
+  EXPECT_EQ(floor(Real("1.3")).toString(), "1");
+  EXPECT_EQ(floor(Real("1000")).toString(), "1000");
+  EXPECT_EQ(floor(Real("1000.1")).toString(), "1000");
+  EXPECT_EQ(floor(Real("1000.8")).toString(), "1000");
+}
+
+TEST(RealFunctionsTests, ceilTest) {
+  EXPECT_EQ(ceil(Real("-1000.8")).toString(), "-1000");
+  EXPECT_EQ(ceil(Real("-1000.1")).toString(), "-1000");
+  EXPECT_EQ(ceil(Real("-1000")).toString(), "-1000");
+  EXPECT_EQ(ceil(Real("-1.9")).toString(), "-1");
+  EXPECT_EQ(ceil(Real("-1.5")).toString(), "-1");
+  EXPECT_EQ(ceil(Real("-1.3")).toString(), "-1");
+  EXPECT_EQ(ceil(Real("-1")).toString(), "-1");
+  EXPECT_EQ(ceil(Real("-0.9")).toString(), "0");
+  EXPECT_EQ(ceil(Real("-0.3")).toString(), "0");
+  EXPECT_EQ(ceil(Real("0")).toString(), "0");
+  EXPECT_EQ(ceil(Real("0.3")).toString(), "1");
+  EXPECT_EQ(ceil(Real("0.9")).toString(), "1");
+  EXPECT_EQ(ceil(Real("1")).toString(), "1");
+  EXPECT_EQ(ceil(Real("1.9")).toString(), "2");
+  EXPECT_EQ(ceil(Real("1.5")).toString(), "2");
+  EXPECT_EQ(ceil(Real("1.3")).toString(), "2");
+  EXPECT_EQ(ceil(Real("1000")).toString(), "1000");
+  EXPECT_EQ(ceil(Real("1000.1")).toString(), "1001");
+  EXPECT_EQ(ceil(Real("1000.8")).toString(), "1001");
+}
+
 TEST(RealFunctionsTests, absTest) {
   EXPECT_EQ(abs(Real("8465132.321651651")).toString(), "8465132.321651651");
   EXPECT_EQ(abs(Real("-98465136846516354684651.351")).toString(), "98465136846516354684651.351");